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D. A. Kopriva, *Implementing Spectral Methods for Partial Differential Equations: Algorithms for Scientists and Engineers*, Springer, 2009

C. Pozrikidis, *Introduction to Finite and Spectral Element Methods using MATLAB*, Chapman & Hall/CRC, 2005 (code source 1 or code source 2)

L. N. Trefethen,* Spectral Methods in MATLAB*, SIAM, 2001 (code)